<%--
  Created by IntelliJ IDEA.
  User: 山山大魔王
  Date: 2021/11/26
  Time: 2:03
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%--		分页条开始--%>
<div id="page_nav">
    <%--			大于首页才显示--%>
    <c:if test="${requestScope.page.pageNo > 1}">
        <a href="${requestScope.page.url}&pageNo=1">首页</a>
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageNo-1}">上一页</a>
    </c:if>
    <%--	页码输出的开始--%>
    <c:choose>
        <%--				情况1：总页码小于5--%>
        <c:when test="${requestScope.page.pageTotal <= 5}">
            <c:set var="begin" value="1"></c:set>
            <c:set var="end" value="${requestScope.page.pageTotal}"></c:set>
        </c:when>

        <%--				情况2：总页码大于5--%>
        <c:when test="${requestScope.page.pageTotal > 5}">
            <c:choose>
                <%--						小情况1：当前页码为前三个，页码范围：--%>
                <c:when test="${requestScope.page.pageNo<=3}">
                    <c:set var="begin" value="1"></c:set>
                    <c:set var="end" value="5"></c:set>
                </c:when>
                <%--						小情况2：当前页码为最后三个--%>

                <c:when test="${requestScope.page.pageNo > requestScope.page.pageTotal-3}">
                    <c:set var="begin" value="${requestScope.page.pageTotal-4}"></c:set>
                    <c:set var="end" value="${requestScope.page.pageTotal}"></c:set>

                </c:when>

                <%--						小情况3：4，5，6，7，页码范围是：当前页码-2 ~ 当前页码+2 --%>
                <c:otherwise>
                    <c:set var="begin" value="${requestScope.page.pageNo-2}"></c:set>
                    <c:set var="end" value="${requestScope.page.pageNo+2}"></c:set>

                </c:otherwise>
            </c:choose>

        </c:when>
    </c:choose>
    <c:forEach begin="${begin}" end="${end}" var="i">
        <c:if test="${i == requestScope.page.pageNo}">
            【${i}】
        </c:if>
        <c:if test="${i != requestScope.page.pageNo}">
            <a href="${requestScope.page.url}&pageNo=${i}">${i}</a>
        </c:if>
    </c:forEach>
    <%--	页码输出的结束--%>
    <%--	如果已经是最后一页，则不显示下一页和末页--%>
    <c:if test="${requestScope.page.pageNo  < requestScope.page.pageTotal}">
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageNo+1}">下一页</a>
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageTotal}">末页</a>
    </c:if>
    共${requestScope.page.pageTotal}页，${requestScope.page.pageTotalCount}条记录
    到第<input value="${param.pageNo}" name="pn" id="pn_input"/>页
    <input id="searchPageBtn" type="button" value="确定">

    <script type="text/javascript">
        $(function (){
            $("#searchPageBtn").click(function (){


                var pageNo = $("#pn_input").val();

                <%--var pageTotal = ${requestScope.page.pageTotal};--%>
                <%--alert(pageTotal);--%>
                //javaScript语言中提供了一个location地址栏对象
                //它有一个属性叫herf.它可以获取地址栏的属性
                //href属性可读，可写
                location.href = "${pageScope.basePath}${requestScope.page.url}&pageNo="+pageNo;

            })
        })
    </script>

</div>
<%--		分页条结束--%>
